Dramatization: Sample of calcium arsenate examined at the government laboratory in United States.

Dramatization: Calcium arsenates spray to combat Boll Weevils in United States. A man addresses the people about the correct use of poison at the Deer Park. He says that only calcium arsenate should be used for the purpose. A man picks some calcium arsenate from a barrel and shows it to people. Men stand near barrels full of calcium arsenate. He puts a sample in a box, wraps it and sends it for its examination to the Government laboratory in Tallulah, La. Chemist determines the composition and fluffiness of the sample. Test glass tubes on the table. The grains studied under microscope and the chemist reports the result showing the certificate.